Perhaps you should try some spelling variations:
"improving community performance risk." » "improving country performance risk.", "improving company performance risk.", "improving commercial performance risk.", "improve community performance risk.", "emerging community performance risk.", "embracing community performance risk.", "improving community performance 2019."
"improving indoor performance series." » "improving outdoor performance series.", "improving poor performance series.", "improving donor performance series.", "improving indoor performance studies.", "improving indoor performance size.", "improving india's performance series.", "improving food performance series.", "improving gender performance series."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("improving community performance risk.") or ("improving indoor performance series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("improving community performance risk.") OR ("improving indoor performance series.")).
• Removing quotes may allow a broader search: (( improving community performance risk. ) or ( improving indoor performance series. )).
• Adding a wildcard symbol may retrieve word variants: (("improving community performance risk.") or ("improving indoor performance series."))*.